320540044 has 12 divisors (see below), whose sum is σ = 611940168. Its totient is φ = 145700000.

The previous prime is 320540041. The next prime is 320540053. The reversal of 320540044 is 440045023.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 320539997 and 320540024.

It is not an unprimeable number, because it can be changed into a prime (320540041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3642457 + ... + 3642544.

It is an arithmetic number, because the mean of its divisors is an integer number (50995014).

Almost surely, 2^320540044 is an apocalyptic number.

It is an amenable number.

320540044 is a deficient number, since it is larger than the sum of its proper divisors (291400124).

320540044 is a wasteful number, since it uses less digits than its factorization.

320540044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7285016 (or 7285014 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 320540044 is about 17903.6321454614. The cubic root of 320540044 is about 684.3749383569.

Adding to 320540044 its reverse (440045023), we get a palindrome (760585067).

The spelling of 320540044 in words is "three hundred twenty million, five hundred forty thousand, forty-four".